IDB_a008 — Motor Power Open
Full alert identifier: IDB_a008_motorPowerOpen
Alert description
IDB motor power line open circuit is detected.
Potential impact
The IDB enters fallback mode and relinquishes controlling status to the Redundant Control Unit (RCU). The RCU may assume controlling status and perform backup brake boost, but Electronic Brake Distribution (EBD), Anti-lock Brake System (ABS), Brake Traction Control (BTC), Vehicle Dynamics Control (VDC), Panic Brake Assist (PBA), Hydraulic Fade Compensation (HFC), Controlled Deceleration via Parking brake (CDP), Brake Disc Wipe (BDW), External Brake Request (EBR), and Secondary Collision Mitigation (SCM) may be unavailable. Increased braking effort may be necessary to achieve desired deceleration. The vehicle should be driven with extreme caution.
Set condition
The motor power line (IDB connector pin 30) voltage is less than 3V for 1 second while the Electronic Control Unit (ECU) power line (IDB connector pin 1) voltage is greater than 6.5V.
Clear condition
Clears when the motor power line is on at the start of the next power cycle.
Check other alerts
With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of IDB_a008.